java - 为什么播放mp3会强制崩溃？

Question

我使用了完全相同的代码，但使用的是 .wav 文件，它工作了大约 50 次，然后崩溃了。我切换到 mp3 文件，它们根本无法播放。

程序本身工作正常 - 我知道在下面的情况下会发生错误:

case R.id.playButton: 
        switch (korean.getIndex()){
        case -1: break; // This is the case when the program first starts.
        case 0: MediaPlayer.create(this, R.raw.c0).start(); break; 
        case 1: MediaPlayer.create(this, R.raw.c1).start(); break; 
        case 2: MediaPlayer.create(this, R.raw.c2).start(); break; 
        case 3: MediaPlayer.create(this, R.raw.c3).start(); break; 
        case 4: MediaPlayer.create(this, R.raw.c4).start(); break; 
        case 5: MediaPlayer.create(this, R.raw.c5).start(); break; 
        case 6: MediaPlayer.create(this, R.raw.c6).start(); break; 
        case 7: MediaPlayer.create(this, R.raw.c7).start(); break; 
        case 8: MediaPlayer.create(this, R.raw.c8).start(); break; 
        case 9: MediaPlayer.create(this, R.raw.c9).start(); break; 
        case 10: MediaPlayer.create(this, R.raw.c10).start(); break; 
        case 11: MediaPlayer.create(this, R.raw.c11).start(); break; 
        case 12: MediaPlayer.create(this, R.raw.c12).start(); break; 
        case 13: MediaPlayer.create(this, R.raw.c13).start(); break; 
        case 14: MediaPlayer.create(this, R.raw.v14).start(); break; 
        case 15: MediaPlayer.create(this, R.raw.v15).start(); break; 
        case 16: MediaPlayer.create(this, R.raw.v16).start(); break; 
        case 17: MediaPlayer.create(this, R.raw.v17).start(); break; 
        case 18: MediaPlayer.create(this, R.raw.v18).start(); break; 
        case 19: MediaPlayer.create(this, R.raw.v19).start(); break; 
        case 20: MediaPlayer.create(this, R.raw.v20).start(); break; 
        case 21: MediaPlayer.create(this, R.raw.v21).start(); break; 
        case 22: MediaPlayer.create(this, R.raw.v22).start(); break; 
        case 23: MediaPlayer.create(this, R.raw.v23).start(); break; 
        default: break;
        } 

我知道这很多——但这些是静态方法调用，所以应该没问题，对吧？为什么会崩溃？

Answer 1

您一个接一个地创建 MediaPlayer 对象并且从不释放资源，因此您可能会耗尽内存，请考虑:

// declare mp as class field.
MediaPlayer mp = null;

//...

case R.id.playButton:
    if (mp != null)
        mp.release();
    switch (korean.getIndex()){
    case -1: break; // This is the case when the program first starts.
    case 0: mp = MediaPlayer.create(this, R.raw.c0);mp.start(); break; 
    case 1: mp = MediaPlayer.create(this, R.raw.c1);mp.start(); break; 
    case 2: mp = MediaPlayer.create(this, R.raw.c2);mp.start(); break; 
    // and so on

或者，您可以set OnCompletionListener并在那里调用release。